Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu hoan do snippets" » "thi hoan do snippets", "thu hoach do snippets", "thu ha do snippets", "thu hoan doi snippets", "thu doan do snippets", "thu toan do snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("thu hoan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu hoan do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu hoan do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu hoan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.